package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.DishVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.util.Collections;
import java.util.List;

/**
 * 套餐业务实现
 */
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    @Transactional
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

    /**
     * 新增套餐与对应的菜品
     * @param setmealDTO
     */
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //插入套餐表
        setmealMapper.insert(setmeal);
        //获取insert后生成的id
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (!CollectionUtils.isEmpty(setmealDishes)) {
            setmealDishes.forEach(setmealDish -> {
                //填充套餐id
                setmealDish.setSetmealId(setmealId);
                //填充菜品id
                Long dishId = dishMapper.getIdByName(setmealDish.getName());
                setmealDish.setDishId(dishId);
            });
            //向套餐菜品关系表插入n条数据
            setmealDishMapper.insertBatch(setmealDishes);
        }

    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前套餐是否在起售中
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        for (Long id : ids) {
            //删除套餐表中的数据
            setmealMapper.deleteById(id);
            //删除套餐菜品表中的数据
            setmealDishMapper.deleteBySetmealId(id);
        }

    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        //根据id查询套餐数据
        Setmeal setmeal = setmealMapper.getById(id);
        //根据id查询套餐关联的菜品
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        //封装数据
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 更新套餐
     * @param setmealDTO
     */
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //获取套餐id
        Long setmealId = setmealDTO.getId();
        //修改套餐表信息
        setmealMapper.update(setmeal);
        //修改套餐关联菜品表信息
        //删除再重新插入套餐菜品数据可以统一修改新增、更改、删除的情况
        //删除原有的套餐菜品数据
        setmealDishMapper.deleteBySetmealId(setmealId);
        //重新插入套餐菜品数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (!CollectionUtils.isEmpty(setmealDishes)) {
            setmealDishes.forEach(setmealDish -> {
                //填充套餐id
                setmealDish.setSetmealId(setmealId);
                //填充菜品id
                Long dishId = dishMapper.getIdByName(setmealDish.getName());
                setmealDish.setDishId(dishId);
            });
            //向套餐菜品关系表插入n条数据
            setmealDishMapper.insertBatch(setmealDishes);
        }

    }

    /**
     * 起售停售套餐
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        setmealMapper.startOrStop(status, id);
    }
}
